chapter Sequents

session Sequents = Pure +
  description "
    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
    Copyright   1991  University of Cambridge

    Various Sequent Calculi for Classical, Linear, and Modal Logic.

    Much of the work in Modal logic was done by Martin Coen. Thanks to Rajeev
    Gore' for supplying the inference system for S43. Sara Kalvala reorganized
    the files and supplied Linear Logic. Jacob Frost provided some improvements
    to the syntax of sequents.


    Useful references on sequent calculi:

    Steve Reeves and Michael Clarke, Logic for Computer Science
    (Addison-Wesley, 1990)

    G. Takeuti, Proof Theory (North Holland, 1987)


    Useful references on Modal Logics:

    Melvin C Fitting, Proof Methods for Modal and Intuitionistic Logics
    (Reidel, 1983)

    Lincoln A. Wallen, Automated Deduction in Nonclassical Logics (MIT Press,
    1990)


    Useful references on Linear Logic:

    A. S. Troelstra, Lectures on Linear Logic (CSLI, 1992)

    S. Kalvala and V. de Paiva, Linear Logic in Isabelle (in TR 379, University
    of Cambridge Computer Lab, 1995, ed L. Paulson)
  "
  directories "LK"
  theories
    LK
    ILL
    ILL_predlog
    Washing
    Modal0
    T
    S4
    S43
    (* Examples for Classical Logic *)
    "LK/Propositional"
    "LK/Quantifiers"
    "LK/Hard_Quantifiers"
    "LK/Nat"
